The gametophyte / sporophyte bear antheridia and archegonia.

Answer

**Step-by-Step Solution:**

1. **Understand the Terms**:
- First, we need to clarify what gametophytes and sporophytes are.
- Gametophytes are the haploid phase (N) of the plant life cycle, while sporophytes are the diploid phase (2N).

2. **Identify Structures**:
- Antheridia and archegonia are the reproductive structures found in plants.
- Antheridia are the male reproductive organs that produce sperm, while archegonia are the female reproductive organs that produce eggs.

3. **Determine the Stage**:
- Since antheridia and archegonia are associated with gametes, they are found in the gametophyte stage, which is haploid.
- Sporophytes, being diploid, do not bear these structures.

4. **Conclusion**:
- Therefore, the correct answer to the question of which structure bears antheridia and archegonia is the gametophyte.

**Final Answer**: The gametophyte bears antheridia and archegonia.

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